\(\left(\dfrac{x-2}{x+2}+\dfrac{6x-4}{x^2-4}\right):\dfrac{x+1}{x-2}\)
\(=\dfrac{x^2-4x+4+6x-4}{\left(x+2\right)\left(x-2\right)}\cdot\dfrac{x-2}{x+1}\)
\(=\dfrac{x^2+2x}{x+2}\cdot\dfrac{1}{x+1}=\dfrac{x}{x+1}\)
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